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Merge branch 'atm-replace-in_interrupt-usage'

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Sebastian Andrzej Siewior says:

====================
atm: Replace in_interrupt usage

this mini series contains the removal of in_interrupt() in drivers/atm
====================

Link: https://lore.kernel.org/r/20201116162117.387191-1-bigeasy@linutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2020-11-18 16:44:02 -08:00
commit 280bb3f98b
4 changed files with 30 additions and 10 deletions
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3
drivers/atm/lanai.c
View File

@ -765,8 +765,7 @@ static void lanai_shutdown_tx_vci(struct lanai_dev *lanai,
struct sk_buff *skb;
unsigned long flags, timeout;
int read, write, lastread = -1;
APRINTK(!in_interrupt(),
"lanai_shutdown_tx_vci called w/o process context!\n");
if (lvcc->vbase == NULL) /* We were never bound to a VCI */
return;
/* 15.2.1 - wait for queue to drain */

24
drivers/atm/nicstar.c
View File

@ -130,8 +130,9 @@ static int ns_open(struct atm_vcc *vcc);
static void ns_close(struct atm_vcc *vcc);
static void fill_tst(ns_dev * card, int n, vc_map * vc);
static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb);
static int ns_send_bh(struct atm_vcc *vcc, struct sk_buff *skb);
static int push_scqe(ns_dev * card, vc_map * vc, scq_info * scq, ns_scqe * tbd,
struct sk_buff *skb);
struct sk_buff *skb, bool may_sleep);
static void process_tsq(ns_dev * card);
static void drain_scq(ns_dev * card, scq_info * scq, int pos);
static void process_rsq(ns_dev * card);
@ -160,6 +161,7 @@ static const struct atmdev_ops atm_ops = {
.close = ns_close,
.ioctl = ns_ioctl,
.send = ns_send,
.send_bh = ns_send_bh,
.phy_put = ns_phy_put,
.phy_get = ns_phy_get,
.proc_read = ns_proc_read,
@ -1620,7 +1622,7 @@ static void fill_tst(ns_dev * card, int n, vc_map * vc)
card->tst_addr = new_tst;
}
static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb)
static int _ns_send(struct atm_vcc *vcc, struct sk_buff *skb, bool may_sleep)
{
ns_dev *card;
vc_map *vc;
@ -1704,7 +1706,7 @@ static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb)
scq = card->scq0;
}
if (push_scqe(card, vc, scq, &scqe, skb) != 0) {
if (push_scqe(card, vc, scq, &scqe, skb, may_sleep) != 0) {
atomic_inc(&vcc->stats->tx_err);
dev_kfree_skb_any(skb);
return -EIO;
@ -1714,8 +1716,18 @@ static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb)
return 0;
}
static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb)
{
return _ns_send(vcc, skb, true);
}
static int ns_send_bh(struct atm_vcc *vcc, struct sk_buff *skb)
{
return _ns_send(vcc, skb, false);
}
static int push_scqe(ns_dev * card, vc_map * vc, scq_info * scq, ns_scqe * tbd,
struct sk_buff *skb)
struct sk_buff *skb, bool may_sleep)
{
unsigned long flags;
ns_scqe tsr;
@ -1726,7 +1738,7 @@ static int push_scqe(ns_dev * card, vc_map * vc, scq_info * scq, ns_scqe * tbd,
spin_lock_irqsave(&scq->lock, flags);
while (scq->tail == scq->next) {
if (in_interrupt()) {
if (!may_sleep) {
spin_unlock_irqrestore(&scq->lock, flags);
printk("nicstar%d: Error pushing TBD.\n", card->index);
return 1;
@ -1771,7 +1783,7 @@ static int push_scqe(ns_dev * card, vc_map * vc, scq_info * scq, ns_scqe * tbd,
int has_run = 0;
while (scq->tail == scq->next) {
if (in_interrupt()) {
if (!may_sleep) {
data = scq_virt_to_bus(scq, scq->next);
ns_write_sram(card, scq->scd, &data, 1);
spin_unlock_irqrestore(&scq->lock, flags);

1
include/linux/atmdev.h
View File

@ -186,6 +186,7 @@ struct atmdev_ops { /* only send is required */
void __user *arg);
#endif
int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
int (*send_bh)(struct atm_vcc *vcc, struct sk_buff *skb);
int (*send_oam)(struct atm_vcc *vcc,void *cell,int flags);
void (*phy_put)(struct atm_dev *dev,unsigned char value,
unsigned long addr);

12
net/atm/raw.c
View File

@ -54,6 +54,8 @@ static int atm_send_aal0(struct atm_vcc *vcc, struct sk_buff *skb)
kfree_skb(skb);
return -EADDRNOTAVAIL;
}
if (vcc->dev->ops->send_bh)
return vcc->dev->ops->send_bh(vcc, skb);
return vcc->dev->ops->send(vcc, skb);
}
@ -71,7 +73,10 @@ int atm_init_aal34(struct atm_vcc *vcc)
vcc->push = atm_push_raw;
vcc->pop = atm_pop_raw;
vcc->push_oam = NULL;
vcc->send = vcc->dev->ops->send;
if (vcc->dev->ops->send_bh)
vcc->send = vcc->dev->ops->send_bh;
else
vcc->send = vcc->dev->ops->send;
return 0;
}
@ -80,7 +85,10 @@ int atm_init_aal5(struct atm_vcc *vcc)
vcc->push = atm_push_raw;
vcc->pop = atm_pop_raw;
vcc->push_oam = NULL;
vcc->send = vcc->dev->ops->send;
if (vcc->dev->ops->send_bh)
vcc->send = vcc->dev->ops->send_bh;
else
vcc->send = vcc->dev->ops->send;
return 0;
}
EXPORT_SYMBOL(atm_init_aal5);